Jeep NP231

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NP 231 Jeep - 21 and 23 Spline

The 1987-94 models have a different bevel gear angle than 1995 and newer. There are two different front input shaft lengths, 4.125" AND 5.125". The TF999 uses the 23 spline long and the AX15 uses the 23 spline short. The Peugot AW4 up to 1990 used the 21 spline shaft and 1991 and newer used the 23 spline. All AX5 models use 21 spline.
    We have the complete line of grears available in 21 and 23 spline for all 231's as well as 4 to 1 kits and Slip Yoke Eliminator kits.